India, Dec. 20 -- At least nine real-estate developers in Gurugram have been penalised since the invocation of the Graded Response Action Plan (Grap)-3 on November 11 in the district for violating the pollution control norms by allegedly conducting unauthorised construction at commercial and residential projects, officials at Haryana State Pollution Control Board (HSPCB) said on Friday.

Officials said many of the under construction projects had excavation and marble setting works ongoing when vigilance squads of the HSPCB's regional office in Gurugram conducted inspections.

According to HSPCB officials, a total penalty of Rs.1.6 crores was imposed on nine realtors who were found violating the Grap norms. "Our three patrolling teams have...